and by the alfred p. sloan foundation, supporting science, technology and improved economic performance and financial literacy in the 21st century. and with the ongoing support of these institutions and foundations. and this program was made possible by the corporation for public broadcasting and by contributions to your pbs station from viewers like you. thank you. captioning sponsored by macneil/lehrer productions captioned by media acce "the electric company" is brought to you by... find your voice and share it, american greetings, proud sponsor of "the electric company." agreement from the u.s. department of education's ready to learn grant, and viewers like you, thank you. ords: tip -- when something tips, it leans over to one side. weight -- weight is how heavy something is. scale -- a scale is a tool you use to figure out how heavy something is. add -- when you add things, you are putting them together. fabulous -- when someone or something is fabulous, it's really, really great. so we have tip, we